function s1_hello() {
       echo "hello,world!"
}

function s2_tell_who_i_am() {
	whoami
}

function s3_whicch_distro_do_i_use() {
	cat /etc/os-release | head -n 1
}

function s4_view_my_cpu_arch() {
	uname -m
}

function s5_show_first_scsi_disk_size() {
	lsblk -1 | \grep disk | head -n 1 | awk '{
	size = $4
	print substr(size,1,2)
  }'
}

function s6_show_main_memory_size_in_megabytes() {
	free -m | grep "Mem:" | awk '{print $2}'
}
